Home / 811,005.21-1,216,231.02-331,158.27

Finding the Fourth Proportional to 811,005.21, 1,216,231.02 and 331,158.27

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Solution

The fourth proportional to 811,005.21, 1,216,231.02 and 331,158.27 is: 496,624.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,005.21 : 1,216,231.02 = 331,158.27 : x
  2. Step 2: Convert to fraction form
    811,005.21/1,216,231.02 = 331,158.27/x
  3. Step 3: Cross multiply
    811,005.21x = 1,216,231.02 × 331,158.27
  4. Step 4: Simplify right side
    811,005.21x = 402,764,965,995.78
  5. Step 5: Solve for x
    x = 402,764,965,995.78/811,005.21
  6. Step 6: Final answer
    x = 496,624.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.